Blake Lively Tells Great White Shark Tales

Kevin Winter/Tonight Show/Getty

updated 06/16/2011 AT 4:00 PM ET

originally published 06/16/2011 AT 4:20 PM ET

How does Blake Lively face her greatest fears?

By looking them square in the face – while safe behind the bars of a cage.

The actress told Jay Leno that she went shark diving while on location for The Green Lantern in South Africa.

“On the plane, I was hearing these flight attendants talk about shark diving. They said, ‘You can go cage diving with great white sharks,’ and I’m terrified of sharks,” Lively said. “So, I said, ‘That sounds like a horrible idea – let’s do it!’”

The actress described the experience, which she called both “so amazing” and “terrifying,” as the kind of event that wouldn’t be desirable for anyone.